help Rich or Eric

S

smrmx

Member

Nov 18, 2001

36

0

• Oct 14, 2007

• #1

I got a 1995 yz 125 that someone put a 2000 cylinder on it after talkin to Eric I put a 2000 piston with a 1038 wrist pin bearing.Problem is bike still won't start.cylinder is brand new from dealer.Have good blue spark and is getting fuel.It tries to hit off and on but just won't run.any ideas you guys are the only people I trust when it comes to bikes.

 

T

todd36

Member

Sep 3, 2007

54

0

• Oct 15, 2007

• #2

If it has good compression, nice blue spark and the timing is right I would look at the fuel system. What does the plug look like after trying to start it?

 

J

JD_MXRacer

Member

Nov 27, 2006

411

0

• Oct 15, 2007

• #3

fine then i wont share my very useful knowledge :fft:

 

MXSparx

Mr. Meltsomeglass

Jul 25, 1999

3,723

71

NoVa

• Oct 15, 2007

• #4

You can share. We'll just make you Rich for a day :)

 

Rich Rohrich

Moderator / BioHazard

LIFETIME SPONSOR

Jul 27, 1999

22,839

16,904

Chicago

• Oct 15, 2007

• #5

As todd36 suggested, you have to start with the basics.

Make sure the reeds seal properly, verify the ignition timing (if possible) , make sure the cdi connections are clean and tight, verify the coil has a good ground, make sure the plug wire is clean and undamaged, make sure you have adequate compression, and make sure you are getting enough fuel to start it but not so much that the plug gets doused and fouls.

Once you are sure you have those things right it will tend to start. ;)

 

S

smrmx

Member

Nov 18, 2001

36

0

• Oct 15, 2007

• Thread starter
• #6

I have checked all those things. I have checked cdi and stator with donor bike . but I wasn't sure because of the cylinder if that was the cause.1994-1996 crank same 1996-2000 cylinder same so I think it should work just very strange.
I don't think I overlooked anything but not sure.

 

S

smrmx

Member

Nov 18, 2001

36

0

• Oct 17, 2007

• Thread starter
• #7

I figured it out the old owner put a 01 stator and flywheel on the bike.flywheel key is in different place.I retimed it and it started right up.


thanks


:ride: